196965-94-3 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-(2-(1-ethylnaphtho(1,2-d)thiazol-2(1H)-ylidene)-1-((1-ethylnaphtho(1,2-d)thiazol-2(1H)-ylidene)methyl)ethylidene)-1,3-bis(2-methoxyethyl)-, monohydrochloride